Health Deals Radar — May 19, 2026

One deal today has a hard expiry: the iHerb code MAY26SW cuts out on May 20 at 10:00 a.m. PT. Everything else — Costco's May coupon book, Vitacost codes, and Amazon picks — stays open through later in the week or longer. Here's the full picture.

Quick-scan summary

Retailer	Deal	Discount	Expires
iHerb (worldwide)	Code MAY26SW — any supplement order	15% off $60+ / 20% off $100+	May 20, 10 a.m. PT
iHerb (USA only)	Code MBDAILY — any order, no minimum	20% off	While active — one-time use
iHerb (USA only)	Code MAYWELLNESS — orders $60+	22% off	May 30
iHerb (no code needed)	BOGO promotions — iHerb brands	Up to 80% off second item	Ongoing
Vitacost	Code SELECTBRON — Dr. Bronner's products	20% off	May 25, 7 a.m. ET
Costco (in-warehouse + online)	Orgain Collagen Peptides + Probiotics	$6 off → $23.99	June 7
Costco (in-warehouse + online)	Ensure Original Nutrition Shake	$8.50 off → $28.99	June 7
Costco (in-warehouse + online)	Nature Valley Chewy Protein Bars, 30-ct	$5 off	June 7
Amazon	YOSUDA Magnetic Rowing Machine	20% off → $189.99	While stock lasts
Amazon	Barebells Protein Bars, 24-ct	~$1.65/bar → $39.51	While stock lasts

iHerb — act before May 20

Code MAY26SW: 15% or 20% off sitewide (expires tomorrow morning)

MAY26SW is iHerb's (a global online supplement and wellness retailer) strongest currently active worldwide code. 1 It replaced three codes — WKND25, ALLNUTHAWAII, and 15SAVEFUSION — that all expired May 18. 2

Orders over $60: 15% off
Orders over $100: 20% off
Valid in most countries, up to 2 uses per account, expires May 20, 2026 at 10:00 a.m. PT 1

To stack with a referral code: Enter a referral code (e.g., PJZ7818, DVO4205, or DQL3272) first in the referral field, then apply MAY26SW as your promo code at checkout. 3 Referral codes add a further 10% credit, which typically applies toward a future order.

iHerb — USA codes with more time

Two US-only codes discovered May 19 replace the expired batch and have more runway than MAY26SW.

MBDAILY: 20% off with no minimum (one-time use)

MBDAILY is unusual for iHerb: no $60 floor required. 2 Most US promotions require a $60+ cart to unlock any savings, so this is the code to use if you're restocking a single item or testing a new product.

20% off any order — no minimum purchase
USA only, one-time use

MAYWELLNESS: 22% off orders $60+ (valid through May 30)

MAYWELLNESS edges out MAY26SW on discount depth for US shoppers building a larger cart, and it runs through the end of the month. 2

22% off orders over $60
USA only, up to 2 uses, valid until May 30, 2026

Which code to use:

Situation	Best code
US shopper, cart under $60	MBDAILY (20% off, no minimum)
US shopper, cart $60–$99	MAYWELLNESS (22% off)
US shopper, cart $100+	MAYWELLNESS (22% off)
Non-US shopper, cart $60+	MAY26SW (20% off — but act before May 20 at 10 a.m. PT)
Non-US shopper, cart $100+	MAY26SW (20% off — same deadline)

iHerb BOGO promotions (no code needed)

Three buy-one-get-one sales are currently running on iHerb with no promo code required — discounts apply automatically on tagged products: 4

iHerb-brand products: BOGO 40% off
Wellness / skincare / makeup: BOGO 80% off
Sunscreen: BOGO 50% off

Check the iHerb "Specials" page for which specific products qualify — the tagged selection rotates.

Costco — May coupon book (through June 7)

Three health-category items are confirmed in the May 2026 Costco Instant Savings Book, valid in-warehouse and online through June 7. Discounts apply automatically at checkout for Costco members; no code entry is needed.

Product	Regular price	Savings	Sale price
Orgain Collagen Peptides + Probiotics	$29.99	$6 off	$23.99
Ensure Original Nutrition Shake	$37.49	$8.50 off	$28.99
Nature Valley Chewy Protein Bars, 30-ct (PB Dark Choc)	Not disclosed	$5 off	—

5 6

Orgain Collagen Peptides + Probiotics (collagen peptides blended with probiotic strains) at $23.99 is the standout: Costco's per-ounce pricing for collagen is already below most online-only retailers, so the $6 coupon deepens a baseline advantage. 5

Ensure Original Nutrition Shake (a ready-to-drink nutritional supplement commonly used to supplement caloric intake) at $28.99 saves $8.50 off the $37.49 regular price — roughly 23% off. 5

Nature Valley Chewy Protein Bars (Peanut Butter Dark Chocolate, 30-count, 10g protein per bar, gluten-free) carry a $5 off coupon with a limit of 10 boxes per member. 6 The exact sale price was not disclosed by the sources reviewed; check the shelf tag or Costco.com for the current discounted price.

Price adjustment reminder: Bought any of these items within the 30 days before May 11? Costco will refund the savings-book difference at the returns counter (or via the Price Adjustment page on Costco.com for online orders) — bring the item number.

Amazon — today's picks

YOSUDA Magnetic Rowing Machine — $189.99 (20% off)

The YOSUDA Magnetic Rowing Machine (a home-use cardio machine with magnetic resistance, Bluetooth connectivity, app support, and LCD display) is listed at $189.99, a 20% reduction from its regular price, as of May 19. 7

Historical low context is not available for this model — CamelCamelCamel data was not retrieved for this listing. At $189.99, the price is in the range typical for entry-level magnetic rowers; comparison-shop against comparable models before purchasing if historical low data is important to your decision.

Barebells Protein Bars, 24-count — $39.51 (~$1.65 per bar)

Barebells (a Swedish protein bar brand, roughly 20g protein per bar, low sugar) is available in a 24-count pack on Amazon for $39.51, or approximately $1.65 per bar as of May 19. 8 For context, Barebells' own website prices a 12-count box at $30.99 — the Amazon 24-count price works out to roughly half that per-bar rate. 8

Vitacost — active code

SELECTBRON takes 20% off Dr. Bronner's products at Vitacost (a Kroger-owned online health and natural-foods retailer) through May 25, 2026 at 7:00 a.m. ET. 9 Dr. Bronner's Pure-Castile soaps are multi-use concentrates (the 18-in-1 formulas cover body wash, shampoo, household cleaning, and more), making a 20% discount on a larger bottle a practical restock window.

If Vitacost's site loads slowly, try again during off-peak hours — the May 25 deadline gives several days of buffer.

On the horizon: MyProtein Memorial Day sale (May 22)

MyProtein (one of the largest online sports nutrition brands globally, owned by The Hut Group) has announced a 35% off sitewide Memorial Day sale starting May 22. 10 The sale has not yet launched as of May 19; check myprotein.com beginning May 22 to confirm the discount is live before ordering.

Code reference: iHerb quick guide

Code	Discount	Min. order	Region	Expiry	Uses
MAY26SW	15% / 20% off	$60 / $100	Worldwide	May 20, 10 a.m. PT	2
MBDAILY	20% off	None	USA only	While active	1
MAYWELLNESS	22% off	$60	USA only	May 30	2
22WELLNESS22	22% off	$60	USA only	Ongoing	2

Cover image generated by AI.